Related Experiment Videos
The effect of an informational newsletter on control participation rates: a randomized study
1Division of Public Health Sciences, Fred Hutchinson Cancer Research Center, Seattle, WA.
Epidemiology (Cambridge, Mass.)
|September 1, 1991
Abstract:
We employed a randomized study of 344 subjects to determine whether an initial contact letter accompanied by an informational newsletter increased participation in a population-based case-control study. The results indicated that there was no benefit in including a newsletter with a letter of introduction. There may have been a slight detrimental effect, since those who received the newsletter were less likely to consent to an in-person interview (82%) than those who did not (88%).